#include?<stdio.h>
/*?考慮一下哪個輸出該用無參函數哪個輸出該用有參函數呢？?*/
int?learning()
{
????printf("%s\n","小明在慕課網上學習");
????return?0;
}???
int?number?(int?n)
{
????printf("小明在慕課網上已經學習了%d門課程"，n);
????return?0;
}???
?
?
?
int?main()
{
????learning();
????number(5);
????return?0;
}